首先,假设如下SQL表中有数据username=test1,passwd=test1,address=test1
CREATE TABLE `login` (
`username` varchar(10) default NULL,
`passwd` varchar(10) default NULL,
`address` varchar(10) default NULL
) ENGINE=InnoDB DEFAULT CHARSET=gb2312;
配置文件:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd" >
<beans>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost:3306/javaee</value>
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>1234</value>
</property>
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource">
<ref local="dataSource"/>
</property>
</bean>
<bean id="personDAO" class="SpringJDBCSupport.ReadData.PersonDAO">
<property name="jdbcTemplate">
<ref local="jdbcTemplate"/>
</property>
</bean>
</beans>
JavaBean:
package SpringJDBCSupport.ReadData;
import com.mysql.jdbc.Driver;
public class Person ...{
private String name;
private String password;
private String address;
public Person()...{
}
public Person(String name,String password,String address)...{
this.name=name;
this.password=password;
this.address=address;
}
public String getAddress() ...{
return address;
}
public void setAddress(String address) ...{
this.address = address;
}
public String getName() ...{
return name;
}
public void setName(String name) ...{
this.name = name;
}
public String getPassword() ...{
return password;
}
public void setPassword(String password) ...{
this.password = password;
}
public String toString()...{
return this.getName()+"-"+this.getPassword()+"-"+this.getAddress();
}
}
DAO:
其中getPersonByRowCallbackHandler方法根据username获得person对象
package SpringJDBCSupport.ReadData;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.List;
import org.springframework.jdbc.core.BatchPreparedStatementSetter;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;
public class PersonDAO ...{
private JdbcTemplate jdbcTemplate;
public JdbcTemplate getJdbcTemplate() ...{
return jdbcTemplate;
}
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) ...{
this.jdbcTemplate = jdbcTemplate;
}
public int insertPersonUseUpdate(Person person)...{
String sql="insert into login values(?,?,?)";
Object[] params=new Object[]...{
person.getName(),
person.getPassword(),
person.getAddress()
};
return this.getJdbcTemplate().update(sql,params);
}
public int insertPersonUseExecute(Person person)...{
String sql="insert into login values(?,?,?)";
Object[] params=new Object[]...{
person.getName(),
person.getPassword(),
person.getAddress()
};
int[] types=new int[]...{
Types.VARCHAR,
Types.VARCHAR,
Types.VARCHAR
};
return this.getJdbcTemplate().update(sql,params,types);
}
public int[] updatePersonUseBatchUpdate( final List persons)...{
String sql="insert into login values(?,?,?)";
BatchPreparedStatementSetter setter=null;
setter=new BatchPreparedStatementSetter()...{
public int getBatchSize()...{
return persons.size();
}
public void setValues(PreparedStatement ps,int index) throws SQLException...{
Person person=(Person)persons.get(index);
ps.setString(1,person.getName());
ps.setString(2,person.getPassword());
ps.setString(3,person.getAddress());
}
};
return this.getJdbcTemplate().batchUpdate(sql,setter);
}
public Person getPersonByRowCallbackHandler(String username)...{
String sql="select * from login where username=?";
final Person person=new Person();
final Object params[]=new Object[]...{username};
this.getJdbcTemplate().query(sql,params,new RowCallbackHandler()...{
public void processRow(ResultSet rs)throws SQLException...{
person.setName(rs.getString("username"));
person.setPassword(rs.getString("passwd"));
person.setAddress(rs.getString("address"));
}
});
return person;
}
}
测试代码:
package SpringJDBCSupport.ReadData;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;
public class TestJDBCTemplate ...{
public static String filePath="";
public static BeanFactory factory=null;
public static void main(String[] args) ...{
filePath=System.getProperty("user.dir")+File.separator+"SpringJDBCSupport"+File.separator+"ReadData"+File.separator+"hello.xml";
factory=new XmlBeanFactory(new FileSystemResource(filePath));
PersonDAO personDAO=(PersonDAO)factory.getBean("personDAO");
/**//*
* 准备数据
*/
Person p1=new Person("test1","test1","test1");
Person p2=new Person("test2","test2","test2");
Person p3=new Person("test3","test3","test3");
Person p4=new Person("test4","test4","test4");
Person p5=new Person("test5","test5","test5");
List persons=new ArrayList();
persons.add(p3);
persons.add(p4);
persons.add(p5);
//使用jdbcTemplate.update方式
// personDAO.insertPersonUseUpdate(p1);
//使用jdbcTemplate.execute方式
// personDAO.insertPersonUseExecute(p2);
// //使用jdbcTemplate批处理方式
// personDAO.updatePersonUseBatchUpdate(persons);
//使用RowCallbackHandler执行一次查询,并打印person信息
System.out.println(personDAO.getPersonByRowCallbackHandler("test1"));
}
}
运行结果:
test1-test1-test1
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